Valve bag



Jan. 11, 1938.

VALVE BAG Filed Dec. 18, 1936 INVENTOR i" (www ATTORNEYS vPatented Jan.11, 193s UNITED STATES PATENT OFFICE A y VALVE BAG Douglas E. Scott,Chagrin Falls, Ohio, assigner toThe Chase Bag- Company, Cleveland, Ohio,

a. corporation of Delaware Application December 18, 1936, Serial No.116,608

. 4 Claims.

I ordinary valve.

Heretofore valve bags have been filled through a feed .pipe insertedbetween the usual valve ap and the end flaps. It has also been proposedto provide such bags with a paper valve-sealing tube open at both endsand having its inner end aiiixed in the valve opening, and the outer endthereof designed to form a sealing closure. However the use of suchsealing tubes has proven objectionable due to the fact that the tubeshave a tendency to hug the filling spout and prevent the escape of air,thus slowing down lling operations.

The principalobject of the present invention is to provide a. valvesealingtube which obviates the foregoing objections.

Other objects and advantages of the invention will be apparent from aconsideration of the specification in connection with the accompanyingdrawing, in which:

Figure i is a plan view of a bag embodying my invention, showing thevalve sleeve in extended position;

Figure 2 is a section on line 2 2' of Figure 1, with the filling spoutin position;

3 Figure 3 is a fragmentary plan view of the bag showing the valvesleeve partially folded;

Figure 4 is a view similar to Figure 3 showing the valve sleevecompletely folded; and

Figure 5 is an enlarged section taken on line 5-5 of Figure 2.

Referring more particularly to the drawing I0 denotes a paper bag havingthe usual valve flap II, and inner and outer end flaps I2 and I3respectively which close the upper end of the valve when cementedtogether, by means of a layer of 'paste I4.

A valve sealing tube I5 of plain kraft paper is inserted into the valveopening and is secured at one side of its inner end to the valve flapII, by means of a,- layer of paste I6. The upper edgeor face of theflapvalve II` is secured to the inner end flap I2, as by means o fadhesive I1. The adhesive 'I6 and II does not extend outwardly very far,thusleaving the outer end I8v of the -paper tube I5 free to be foldedand tucked into the valve opening after the bag has been filled. Fillingof the bag is effected in 4a customary manner through the opening I9 ofthe insertion of the filling spout 20, the tube will folded corners, isfolded downwardly and in- (Cl. 22S-62.5)

a feed pipe or spout 2li which is inserted into. the paper tube I5.

Practice has proven that when a tube such as just described is opened bythe packer for not stand away from the spout sufficiently to permit theair to escape. In other words the tube will hug the spout so closelythat the air is trapped. In this connection it should be noted that thetube must be of relatively thin nexible 1 tough paper to permit of theflap being effectively folded and tucked.

According to the present invention I make the tube I5 of approximately40 lb. plain kraft paper. Within the tube and ailixed thereto by meansof a gummy pliable adhesive 2i, is a sleeve or lining member 22 ofapproximately 30 lb. crinkled or crimped or creped kraft paper. When thetube is opened by the packer, the crinkled sleeve and the layer of gummyadhesive functions to 20 hold -the' tube open and sufficiently away fromor out of contact with the filling spout to permit of free escape of airthrough air space 24 between the'sleeve and ller tube. In short thedouble walled tube is so pliable and of such consistency that it canreadily be opened orclosed to any desired degree and will remain more orless fixed in such position.' The sleeve 22 is preferably co-extensivewith the tube I 5, and the layer or wall of gummy adhesive 2| preferablycovers the entire opposing faces of the tube and its sleeve.

A thumb opening or cut 23 is provided at one side of the tube tofacilitate opening thereof. 35 After the bag has been filled, and thefilling spout removed, the .tube is preferably first attened, then thecorners 23 are folded downwardly and inwardlyv as illustrated -in Figure3, and finally the outer end of the tube including the ends and havingits inner end aiiixed in the valve opening and having its outer endextending outward from said opening and designed to form a sealingclosure at said outer end, said sealing tube having'a flexible, pliablecrinkled 55 sleeve oi' less weight than said tube ailixed therein.

2. A bag having a valve opening, a valve sealing tube open at both endsand having its inner end affixed to the inside of the -walls of thevalve and having its outer end extending far enough to fold, there beinga space between the tubel and the outer edge of the valve adapted toreceive the 4folded end of the tube, said sealing tube having a ilexiblepliable crinkled sleeve of relatively light material aixed therein,said@ I at its inner end, the outer end ot the tube exhaving a exibiecrinkled pliable sleeve aiiixed therein.

4. A bagredy opening',v a valve sealing tube open at both ends fandhaving its inner end aillxed in the valve opening and having its outerend extending outward from said openingand designed to form a sealingclosure at said 'outer end, said tube comprising an outer layer of plainkraft paper and an inner layer oi crinkled paper, said layers beingamxed together by a layer of adhesive.

DOUGLAS E. SCOT-r.

for filling and having a valve I

